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All Journal Eksergi: Chemical Engineering Journal Techno: Jurnal Penelitian AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Alat Berat
Samosir, Devina Sanchia
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Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Analisis Kerusakan Brake Accumulator Unit HM400-2R Di PT. United Tractors Site Muara Lawa Marali, Aryati Muhaymin; Nugroho, Dafian Dwi; Zulkifli, Zulkifli; Samosir, Devina Sanchia; Sabitah, A’yan
JURNAL ALAT BERAT Vol 2 No 1 (2025): Januari 2025
Publisher : Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jab.v2i1.34

Abstract

Pada PT. United Tractors Tbk. site Muara Lawa terdapat unit articulated dump truck yang mengalami breakdown dengan kerusakan yang terdapat pada brake accumulator. Penelitian ini bertujuan untuk mengetahui penyebab kerusakan komponen brake accumulator pada unit articulated dump truck Komatsu HM400-2R dengan gejala yang timbul berupa kebocoran. Berdasarkan hasil observasi brake accumulator mengalami kebocoran pada gas valve. kerusakan tersebut mengakibatkan kinerja brake system menurun. Pada saat unit beroperasi dan brake system digunakan, terjadi delay yang mengakibatkan kinerja dari brake system tidak normal. Penyebab terjadinya kerusakan komponen brake accumulator pada unit articulated dump truck Komatsu HM400-2R, dikarenakan terjadinya kerusakan pada seal step dan seal piston yang sudah tidak prima, sehingga hasil kerusakan dari seal step dan seal piston menyebabkan timbulnya partikel dan mengakibatkan piston menjadi scratch. Akibat dari kerusakan komponen tersebut menyebabkan fluida dan gas nitrogen tercampur, dan kebocoroan disebabkan oleh kerusakan pada gas valve, cara mengatasi kerusakan yang terjadi pada brake accumulator unit articulated dump truck Komatsu HM400-2R, yaitu dengan memberikan solusi penawaran best repair cost yaitu melakukan repair pada brake accumulator dengan perbandingan biaya 45% lebih murah dibandingkan dengan mengganti unit assy.
Optimization of Drying Time and Thermal Performance of Solar Dryer for Tekwan Products Based on Energy Balance Analysis Samosir, Devina Sanchia; Bow, Yohandri; Aswan, Arizal
TECHNO: JURNAL PENELITIAN Vol 14, No 1 (2025): TECHNO JURNAL PENELITIAN
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v14i1.9790

Abstract

Energy requirements for production efficiency can be obtained from fossil fuels or renewable energy sources. The traditional drying process in Tekwan production is often inefficient and weather-dependent. Solar-powered drying technology using photovoltaic panels can improve cleanliness, efficiency, and product quality, and is suitable for application in Indonesia. Traditional drying faces challenges in terms of time efficiency and product quality due to weather dependence. This study designed a drying device with tiered racks and an automatic motor for heat distribution. Tests were conducted at 40°C for 1 to 5 hours to analyze moisture content, energy efficiency, and exergy. Results showed a decrease in moisture content from 57.21% to 34% after 5 hours, although it did not meet the SNI 11 standard. The highest thermal efficiency was achieved at 4 hours (84.42%), exergy efficiency was 77.61%, and the lowest exergy loss was 0.520 kJ/mol. Environmental factors, such as humidity and airflow speed, influence performance. Heat loss through convection and radiation remain the main challenges. Design improvements are needed to reduce heat loss and achieve optimal drying.
Production of Bioethanol from Bunches of Palm Oil Using Purification Equipment with Bioethanol Traps Samosir, Devina Sanchia; Bow, Yohandri; Hasan, Abu
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 6 No. 3 (2022)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v6i3.123

Abstract

Due to the rising demand for motor vehicle fuel, Indonesia's requirement for fossil fuels rises by an average of 10% annually. The supply of fossil energy, which serves as the primary raw material for generating fuel oil, is negatively correlated with the demand for fuel (BBM). Fresh Fruit Bunches (FFB), Empty Fruit Bunches (EFB), and fiber were the types of oil palm bunches employed in this investigation. EFB and fiber are industrial by products that are currently being used inefficiently and frequently pollute the environment. This trash is still only very minimally processed; it is still stored, burned in the incinerator, used as mulch on oil palm fields, and composted. 51.2 percent cellulose and 16.30 percent lignin are both present in EFB. Lignin makes up 20.0 percent of fiber, whereas cellulose makes up 57.0 percent. Through chemical and enzymatic procedures, this cellulose content may be exploited as a source of reducing sugars. FFB is used as a benchmark to evaluate how effectively the prototype tool works. Different kinds of high-quality bioethanol are produced from each raw source. Different kinds of high-quality bioethanol are produced from each raw source. Fresh Fruit Bunches (FFB), which have a refractive index of 1.35676 and a volume of 2,192 ml, are the best quality of bioethanol made from raw materials. The findings demonstrated that varied volumes and refractive indices were produced depending on how raw materials were treated. The quality generated improves with increased treatment volume. Alkaline delignification was followed by acid delignification to get the optimum grade. Empty Fruit Bunch (EFB) material, which had a refractive index of 1.34376, 2,105 ml of bioethanol, and a 68.15 percent ethanol concentration. This study is unique in that it includes a bioethanol trap to quicken the conversion of steam into liquid bioethanol. Condensation is completed in 15–20 minutes less time thanks to the bioethanol trap.
Analisis Kebocoran Sistem Lubrikasi Pada Rear Engine Komatsu PC 2000-8 Kurniawan, Yudi; Mulyanto, Subur; Dwimas, Herdian; Samosir, Devina Sanchia; Sugino, Riski
JURNAL ALAT BERAT Vol 3 No 1 (2026): Januari 2026
Publisher : Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jab.v3i1.43

Abstract

Penelitian ini bertujuan untuk menganalisis penyebab kebocoran oli pada sisi belakang engine pada unit excavator Komatsu PC 2000-8. Kebocoran oli pada sistem pelumas dapat menyebabkan penurunan kinerja engine dan kerusakan pada komponen lainnya. Metode yang digunakan dalam penelitian ini adalah penelitian lapangan dengan melakukan identifikasi penyebab, pengamatan dan diagnosis, pengumpulan data, analisis, penyebab yang dicurigai, kesimpulan, dan tindakan perbaikan. Hasil penelitian menunjukkan bahwa penyebab utama kebocoran sistem pelumasan pada sisi belakang engine dikarenakan terjadi contact surface pada sleeve rear seal yang mengalami keausan, sehingga dapat yang mengakibatkan kebocoran oli engine ke dalam sistem PTO. Dengan perbaikan pada komponen yang sesuai standar, kebocoran sistem lubrikasi ini dapat diatasi dan diminimalisasi.
Formulation and Characterization of Herbal Lip Balm Utilizing Red Dragon Fruit (Hylocereus polyrhizus) Extract as a Natural Colorant and Active Ingredient Samosir, Harrys; Sarmila, Tina; Maharani, Loza Asmi Nahara; Samosir, Devina Sanchia
Eksergi Vol 23 No 1
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/eksergi.v23i1.15867

Abstract

This study formulated an herbal lip balm using dragon fruit extract (Hylocereus spp.) as a natural colorant and moisturizer. The extract was integrated with a base of coconut oil, beeswax, cocoa butter, vitamin E, and rose water. Physical testing indicated an average pH of 5.08 and a melting point of 63–65 °C, complying with standard safety requirements for lip care products. Organoleptic evaluation by 10 panelists demonstrated high acceptance, with 90% approving the soft texture and aroma, and 85% favoring the natural pink color. The product exhibited stability over a 28-day storage period. Material characterization via X-Ray Diffraction (XRD) identified an amorphous crystal structure (2θ ≈ 25.60 ), while Scanning Electron Microscopy (SEM) revealed a porous surface with a particle distribution of 8μm. X-Ray Fluorescence (XRF) analysis confirmed the extract is rich in macro-elements, specifically Potassium (67.5%), Calcium (15.5%), Magnesium (8.5%), and Phosphorus (8.4%).
Co-Authors Abu Hasan Arizal Aswan Dwimas, Herdian Maharani, Loza Asmi Nahara Marali, Aryati Muhaymin Nugroho, Dafian Dwi Sabitah, A'yan Samosir, Harrys Sarmila, Tina Subur Mulyanto, Subur Sugino, Riski Yohandri Bow Yudi Kurniawan Zulkifli Zulkifli